Adjustment device for installing anchor cage of wind turbine generator and construction method thereof

Abstract

The present invention discloses an adjustment device for installing an anchor cage of a wind turbine generator. The anchor cage comprises an upper anchor plate, a lower anchor plate and a plurality of adjustment anchors connected between the upper anchor plate and the lower anchor plate. The adjustment device comprises two vertically arranged adjustable support members, and the two ends of the adjustable support member are respectively supported between the upper anchor plate and the lower anchor plate. The adjustable support member comprises a supporting main rod and a fixing member. The two ends of the supporting main rod are respectively connected to the upper anchor plate or the lower anchor plate through the fixing member. The supporting main rod comprises an adjustment basket. The present invention can achieve the advantage of rapid installation and adjustment of the anchor cage.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to an adjustment device for installing an anchor cage of a wind power generator and a construction method thereof. Background Art

[0002] At present, the foundation of wind turbines in China is generally an independent reinforced concrete foundation, and the main forms are foundation ring foundation and anchor cage foundation. The foundation ring is rigidly connected to the reinforced concrete. When the wind turbine runs for a long time, a gap is easily formed between the foundation ring and the concrete, affecting the safe operation of the wind turbine. The anchor cage is generally composed of lower and upper anchor plates, anchor bolts and PVC protective pipes. The PVC protective pipe is used to isolate the concrete from the anchor bolts between the lower anchor plate and the upper anchor plate. The anchor bolts are connected to the tower using tensioning jacks to apply prestress to the anchor bolts. When the anchor bolts are subjected to tension, the force will be evenly applied to the part above the lower anchor plate of the anchor bolts. The entire anchor bolt becomes an elastic body without the interface between the rigid part and the elastic part, so that the stress concentration phenomenon can be avoided. Compared with the foundation ring foundation, the safety and reliability of the wind turbine operation are improved.

[0003] The anchor cage needs to be assembled and installed on site before the construction of the foundation reinforced concrete, and the installation accuracy is controlled at the millimeter level, which places high demands on the installation quality control. The traditional anchor cage installation upper and lower anchor plate concentricity adjustment adopts the method of setting a pile at every 90° position on the outside of the wind turbine foundation (on the natural floor surface), and then connecting the upper anchor plate to the pile with a towing rope equipped with a basket bolt, and adjusting the basket bolts in four directions to make the upper and lower anchor plates concentric (taking the center line of the bolt holes of the upper and lower anchor plates as the reference, using a theodolite to measure the verticality, measuring a total of 4 points, one point every 90°, so that the upper and lower anchor plates are concentric, and the concentricity allowable deviation should meet ≤3mm). This method requires setting piles on the outside of the anchor cage, which often interferes with the installation of steel bars and other operations, which is not conducive to the rapid construction of the wind turbine foundation; and it needs to be adjusted repeatedly in four directions, which is not efficient.

[0004] The traditional anchor cage installation process is:

[0005] 1. Leave embedded parts

[0006] Embedded parts are used to support the anchor cage through supporting bolts. When pouring the cushion concrete, embedded parts are retained according to the designed position and quantity. The embedded parts are generally steel plates, and they are required to be tightly combined with the cushion concrete when retained.

[0007] 2. Installation of lower anchor plate

[0008] 2.1 Choose a suitable crane, lift the lower anchor plate and move it to the appropriate position above the embedded part and stop it. First, insert the lower anchor plate support bolts into the support bolt holes on the lower anchor plate, place a nut on the upper and lower parts of the lower anchor plate, and add a gasket to the nut under the lower anchor plate. After the inner and outer support bolts are aligned with the embedded parts, the crane places the lower anchor plate on the embedded parts. The distance from the upper plane of the lower anchor plate to the embedded parts is based on the design requirements of the foundation drawing. The center of the lower anchor plate corresponds to the center of the foundation, and the maximum allowable deviation is 5mm.

[0009] 2.3 Weld the lower anchor plate support bolts to the corresponding embedded parts firmly, and the weld height should not be less than 6mm.

[0010] 2.4 Adjust the supporting bolts so that the lower anchor plate reaches the design elevation in the drawing and the horizontality of the lower anchor plate does not exceed 3mm.

[0011] 3. Installation of upper anchor plate and adjusting bolts

[0012] 3.1 Screw the nylon adjusting nut into the upper end of the adjusting anchor bolt. The distance from the top of all adjusting anchor bolts to the upper plane of the nylon nut should be consistent with the designed length.

[0013] 3.2 Arrange all the adjustment anchor bolts neatly, and screw the thin nuts on the lower ends of the adjustment anchor bolts. The distance from the lower ends of the adjustment anchor bolts to the lower plane of the thin nuts should be consistent with the designed length. Then put the PVC sleeve into the adjustment anchor bolts, and then put the heat shrink tube on the PVC sleeve.

[0014] 3.3 Use a crane to lift the upper anchor plate to a certain height, and then insert all the adjustment anchor bolts into the inner and outer adjustment bolt holes of the upper anchor plate. After the adjustment anchor bolts are inserted into the upper anchor plate, put on temporary steel nuts.

[0015] 3.4 After the adjustment anchor bolts are inserted, the crane slowly lifts the upper anchor plate and the adjustment anchor bolts, moves them to the top of the lower anchor plate, inserts the adjustment anchor bolts into the corresponding adjustment bolt holes of the lower anchor plate, puts a gasket under the lower anchor plate, and tightens the whole nut. The tightening torque requirement for the whole nut is 300 N·m.

[0016] 4. Adjustment and fixing of anchor cage

[0017] 4.1 Set a pile every 90° on the outside of the wind turbine foundation (on the natural floor surface), then connect the upper anchor plate to the pile with a towing rope equipped with a basket bolt, and adjust the basket bolts in four directions to make the upper and lower anchor plates concentric (take the center line of the bolt holes of the upper and lower anchor plates as the reference, measure the verticality with a theodolite, measure 4 points in total, one point every 90°, so that the upper and lower anchor plates are concentric, and the allowable deviation of concentricity should meet ≤3mm).

[0018] 4.2 After the upper and lower anchor plates are concentric, adjust the levelness of the upper anchor plate: measure and adjust the levelness of the plane cylinder joint area on the upper anchor plate at the anchor bolt (in the middle of the inner and outer anchor bolts), adjust the nylon nuts and temporary steel nuts to make the plane of the upper anchor plate reach the design elevation in the drawing, and the levelness of the upper anchor plate should meet ≤1.5mm.

[0019] The core of anchor cage installation is to ensure the concentricity and horizontality of the lower and upper anchor plates through a set of installation processes.

[0020] The horizontal adjustment of the anchor plate in the traditional anchor cage installation is divided into the horizontal adjustment of the lower anchor plate and the upper anchor plate. The horizontal adjustment of the lower anchor plate does not exceed 3mm, and the horizontal adjustment of the upper anchor plate does not exceed 1.5mm. Since the upper and lower anchor plates are connected by adjusting anchor bolts, the adjusting anchor bolts are fixed at an equal distance between the upper and lower anchor plates. Due to the low horizontal accuracy of the lower anchor plate, it is often difficult and time-consuming to adjust the horizontal adjustment of the upper anchor plate, and the horizontal accuracy is not easy to ensure. Summary of the invention

[0021] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an adjustment device for installing an anchor cage of a wind turbine generator and a construction method thereof, which can realize rapid installation and adjustment of the anchor cage.

[0022] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0023] An adjustment device for installing an anchor cage of a wind turbine generator, the anchor cage comprising an upper anchor plate, a lower anchor plate and a plurality of adjustment anchors connected between the upper anchor plate and the lower anchor plate, the adjustment device comprising two vertically arranged adjustable support members, the two ends of the adjustable support member being respectively supported between the upper anchor plate and the lower anchor plate, the adjustable support member comprising a supporting main rod and a fixing member, the two ends of the supporting main rod being respectively connected to the upper anchor plate or the lower anchor plate through the fixing member, and the supporting main rod comprising an adjustment basket.

[0024] As a further improvement to the above technical solution:

[0025] The supporting main rod comprises a main screw rod and an end screw rod, the adjusting basket is connected between the supporting main rod and the end screw rod, and the end screw rod is connected to a fixing piece.

[0026] The main screw rod of one of the adjustable supporting members is a screw rod with a hole, and the main screw rod of the other adjustable supporting member passes through the hole of the screw rod with a hole.

[0027] The adjustable support member also includes a movable support, and the support main rod is connected to the fixing member via the movable support.

[0028] The adjustable support members further include locking members, respectively, and the fixing members are respectively connected and fixed to the upper anchor plate or the lower anchor plate through the locking members.

[0029] The fixing piece is a U-shaped buckle.

[0030] As a general inventive concept, the present invention also provides a construction method for installing a wind turbine anchor cage, comprising the following steps:

[0031] S1. Leave the embedded parts and install the lower anchor plate, upper anchor plate, anchor bolts and adjustment device;

[0032] S2. Adjust the lower anchor plate support bolts to make the lower anchor plate reach the preset elevation and the horizontality of the lower anchor plate consistent with that of the upper anchor plate;

[0033] S3. Ensure that the upper anchor plate, the lower anchor plate and two of the anchor bolts form a parallelogram by controlling the distance from the lower end of the anchor bolt to the lower plane of the thin nut and the distance from the top end of the anchor bolt to the upper plane of the nylon nut to be consistent;

[0034] S4. Arrange two adjustable supports at 90 degrees on a plane in the anchor cage, and adjust the construction in the anchor cage by adjusting the flower basket. According to the preset distance between the upper anchor plate and the lower anchor plate of the adjustable support, ensure that the upper anchor plate and the lower anchor plate and two of the anchors form a rectangle;

[0035] S5. Measure the concentricity of the upper anchor plate and the lower anchor plate and the horizontality of the upper anchor plate. If the requirements cannot be met, first remeasure the distance between the upper anchor plate and the lower anchor plate with the adjustable support to make the distance consistent with the preset distance, then remeasure the distance between the upper anchor plate and the lower anchor plate, and adjust the nylon nut and the adjustable support until the requirements are met.

[0036] As a further improvement to the above technical solution:

[0037] The anchor bolt is hoisted at one time by using a multi-hole support plate device, wherein the multi-hole support plate device comprises a support plate body and a lifting lug vertically arranged on the support plate body, and a through-rod hole for the anchor bolt to pass through is opened on the support plate body.

[0038] Compared with the prior art, the advantages of the present invention are:

[0039] The adjustment device for installing the anchor cage of a wind turbine generator and the construction method thereof are characterized in that two vertically arranged adjustable support members are arranged in the anchor cage, and adjustment construction is performed in the anchor cage by adjusting the flower basket, and the distance between the adjustable support members and the upper anchor plate and the lower anchor plate is adjusted to quickly adjust the concentricity of the upper anchor plate and the lower anchor plate and the horizontality of the upper anchor plate, thereby improving the installation horizontality accuracy of the lower anchor plate to be consistent with the control accuracy requirement of the horizontality of the upper anchor plate, avoiding interference between the installation of the anchor cage and other construction processes, and realizing rapid installation and adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a front view of the installation of the adjustment device and the anchor cage of the present invention.

[0041] Figure 2 It is a top view of the installation of the adjustment device and the anchor cage of the present invention.

[0042] Figure 3 It is a schematic structural diagram of one of the adjustable support members of the present invention.

[0043] Figure 4 It is a schematic structural diagram of another adjustable support member of the present invention.

[0044] Figure 5 It is a front view of the porous support plate device of the present invention.

[0045] Figure 6 It is a top view of the porous support plate device of the present invention.

[0046] Figure 7 It is a side view of the porous support plate device of the present invention.

[0047] Figure 8 It is a schematic diagram of hoisting of the porous support plate device of the present invention.

[0048] The symbols in the figure represent:

[0049] 1. Adjustable support; 11. Support main rod; 111. Main screw; 112. Adjustment basket; 113. End screw; 12. Fixing piece; 13. Locking piece; 14. Movable support; 2. Multi-hole support plate device; 21. Support plate body; 211. Rod penetration hole; 22. Lifting ear; 24. Temporary nut; 3. Anchor bolt cage; 31. Upper anchor plate; 32. Lower anchor plate; 33. Anchor bolt; 34. Lower anchor plate support bolt; 35. Thin nut; 36. Nylon nut. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] like Figures 1 to 4 As shown, the present embodiment is an adjustment device for installing an anchor cage of a wind turbine, the anchor cage 3 includes an upper anchor plate 31, a lower anchor plate 32 and a plurality of adjustment anchors 33 connected between the upper anchor plate 31 and the lower anchor plate 32, the adjustment device includes two vertically arranged adjustable support members 1, the two ends of the adjustable support member 1 are respectively supported between the upper anchor plate 31 and the lower anchor plate 32, the adjustable support member 1 includes a supporting main rod 11 and a fixing member 12, the two ends of the supporting main rod 11 are respectively connected to the upper anchor plate 31 or the lower anchor plate 32 through the fixing member 12, and the supporting main rod 11 includes an adjustment basket 112.

[0052] Two vertically arranged adjustable support members 1 are arranged in the anchor cage 3, and the construction is adjusted in the anchor cage 3 by adjusting the flower basket 112, and the distance between the adjustable support member 1 and the upper anchor plate 31 and the lower anchor plate 32 is adjusted to quickly adjust the concentricity of the upper anchor plate 31 and the lower anchor plate 32 and the horizontality of the upper anchor plate 31, so as to improve the installation horizontality accuracy of the lower anchor plate 32 to meet the control accuracy requirement of the horizontality of the upper anchor plate 31, avoid interference between the installation of the anchor cage 3 and other construction processes, and realize rapid installation.

[0053] The supporting main rod 11 comprises a main screw rod 111 and an end screw rod 113 , the adjusting basket 112 is connected between the supporting main rod 11 and the end screw rod 113 , and the end screw rod 113 is connected to the fixing member 12 .

[0054] In this embodiment, the main screw 111 of one of the adjustable support members 1 is a screw with a hole, and the main screw 111 of the other adjustable support member 1 passes through the hole of the screw with a hole. The main screw of the other adjustable support member 1 is a straight screw.

[0055] The adjustable support member 1 further comprises a movable support 14 , and the supporting main rod 11 is connected to the fixing member 12 via the movable support 14 .

[0056] The adjustable support member 1 further comprises a locking member 13 , through which the fixing member 12 is connected and fixed to the upper anchor plate 31 or the lower anchor plate 32 .

[0057] In this embodiment, the fixing member 12 is a U-shaped buckle, and the locking member 13 is a locking nut.

[0058] In this embodiment, the fixing member 12 is made of round steel with a diameter of 25 mm and a 10 mm steel plate, the straight screw and the end screw 113 are made of full-thread screws with a nominal diameter of 25 mm and 25 mm round steel, and the hole screw is made of full-thread screws with a nominal diameter of 25 mm and a 10 mm steel plate. The locking member 13 and the adjusting flower basket 112 are purchased on the market and assembled on site when used.

[0059] The construction method of the anchor cage of the wind turbine generator of the present embodiment specifically includes the following steps: retaining embedded parts, installing the lower anchor plate 32 , installing the upper anchor plate 31 and the anchor bolts 33 , and adjusting the anchor cage 3 .

[0060] The anchor bolt 33 is hoisted at one time by using a porous support plate device 2. The porous support plate device 2 includes a support plate body 21 and a lifting ear 22 vertically arranged on the support plate body 21. The support plate body 21 is provided with a plurality of rod holes 211 for the anchor bolt 33 to pass through. Figures 5 to 7 shown.

[0061] In this embodiment, the support plate body 21 is made of 10 mm steel plate, and the through-rod holes 211 on the support plate body 21 are drilled by a drilling machine. The diameter of the through-rod holes 211 is 5 mm larger than the outer diameter of the anchor bolt 33. The center distance between the through-rod holes 311 is equal to the center distance between the anchor plate bolt holes. The lifting ear 22 is made of round steel with a diameter of 20 mm and is firmly welded to the support plate body 21.

[0062] In this embodiment, the number of the rod-piercing member holes 211 is four, and four anchor bolts 33 can be hoisted and installed at the same time. The crane is used for hoisting. Before the crane lifts the anchor bolts, the four anchor bolts 33 are inserted into the four-hole support plate rod-piercing member holes 311 on the ground, and the upper ends are temporarily fixed with temporary nuts 24. The four anchor bolts 33 are hoisted at one time using the multi-hole support plate device 2. Figure 8 shown.

[0063] The working principle of the adjustment device of the present invention is as follows:

[0064] 1. Adjust the lower anchor plate support bolts 34 to make the lower anchor plate 32 reach the design elevation in the drawing, and the levelness of the lower anchor plate 32 does not exceed 1.5 mm (consistent with the levelness of the upper anchor plate 31).

[0065] 2. The length error of each anchor bolt 33 during processing is less than 0.1 mm. By controlling the distance from the lower end of the anchor bolt 33 to the lower plane of the thin nut 35 and the distance from the top of the anchor bolt 33 to the upper plane of the nylon nut 36 to be consistent, it can be ensured that the upper anchor plate 31 and the lower anchor plate 32 form a parallelogram with the anchor bolt 33 (on the same section).

[0066] 3. Two adjustable supports 1 are arranged at 90 degrees on the plane in the anchor cage 3. The construction is adjusted in the anchor cage 3 by adjusting the flower basket 112. The distance between the upper anchor plate 31 and the lower anchor plate 32 of the adjustable support 1 is calculated in advance so that the upper anchor plate 31 and the lower anchor plate 32 and the anchor 33 form a rectangle (on the same section).

[0067] 4. Measure the concentricity of the upper anchor plate 31 and the lower anchor plate 32 and the horizontality of the upper anchor plate 31. Generally, the performance meets the requirements at one time. If not, first remeasure the distance between the upper anchor plate 31 and the lower anchor plate 32 of the adjustable support member 1 to make the distance between the upper anchor plate 31 and the lower anchor plate 32 consistent with the pre-calculated distance, then remeasure the distance between the upper anchor plate 31 and the lower anchor plate 32, and fine-tune the nylon nut 36 and the adjustable support member 1 until the requirements are met.

[0068] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. An adjustment device for installing an anchor cage of a wind turbine generator, the anchor cage (3) comprising an upper anchor plate (31), a lower anchor plate (32) and a plurality of anchor bolts (33) connected between the upper anchor plate (31) and the lower anchor plate (32), the adjustment device comprising two adjustable support members (1), the two ends of the adjustable support members (1) being respectively supported between the upper anchor plate (31) and the lower anchor plate (32), characterized in that: The adjustable support member (1) comprises a support main rod (11) and a fixing member (12), two ends of the support main rod (11) are respectively connected to an upper anchor plate (31) or a lower anchor plate (32) via the fixing member (12), the support main rod (11) comprises an adjustment flower basket (112), and the two adjustable support members (1) are arranged perpendicular to each other; The supporting main rod (11) comprises a main screw rod (111) and an end screw rod (113); the adjusting flower basket (112) is connected between the supporting main rod (11) and the end screw rod (113); and the end screw rod (113) is connected to the fixing member (12); The main screw rod (111) of one adjustable support member (1) is a screw rod with a hole in the middle, and the main screw rod (111) of the other adjustable support member (1) passes through the hole of the screw rod with a hole in the middle; The adjustable support member (1) further comprises a movable support (14), and the main support rod (11) is connected to the fixing member (12) via the movable support (14); The adjustable support member (1) further comprises a locking member (13), and the fixing member (12) is connected and fixed to the upper anchor plate (31) or the lower anchor plate (32) via the locking member (13).

2. The adjusting device according to claim 1, characterized in that: The fixing piece (12) is a U-shaped buckle.

3. A construction method for installing a wind turbine anchor cage using the adjustment device according to claim 1 or 2, characterized in that: The following steps are involved: S1, retaining the embedded parts, and installing the lower anchor plate (32), the upper anchor plate (31), the anchor bolts (33) and the adjustment device; S2, by adjusting the lower anchor plate support bolts (34), the lower anchor plate (32) reaches a preset elevation and the horizontality of the lower anchor plate (32) is consistent with the horizontality of the upper anchor plate (31); S3, a thin nut (35) is arranged on the upper surface of the anchor bolt (33) passing through the lower anchor plate (32), and a nylon nut (36) is arranged on the lower surface of the anchor bolt (33) passing through the upper anchor plate (31), and the distance from the lower end of the anchor bolt (33) to the lower plane of the thin nut (35) and the distance from the top end of the anchor bolt (33) to the upper plane of the nylon nut (36) are controlled to be consistent, so as to ensure that the upper anchor plate (31) and the lower anchor plate (32) and two of the anchor bolts (33) form a parallelogram; S4, arranging two adjustable support members (1) at 90 degrees on a plane in the anchor cage (3), adjusting the construction in the anchor cage (3) by adjusting the flower basket (112), and ensuring that the upper anchor plate (31) and the lower anchor plate (32) and two of the anchors (33) form a rectangle according to the preset distance between the adjustable support members (1) and the upper anchor plate (31) and the lower anchor plate (32); S5. Measure the concentricity of the upper anchor plate (31) and the lower anchor plate (32) and the horizontality of the upper anchor plate (31). If the requirements cannot be met, first re-measure the distance between the adjustable support member (1) and the upper anchor plate (31) and the lower anchor plate (32) to make the distance consistent with the preset distance, then re-measure the distance between the upper anchor plate (31) and the lower anchor plate (32), and adjust the nylon nut (36) and the adjustable support member (1) until the requirements are met.

4. The construction method according to claim 3, characterized in that: The anchor bolt (33) is hoisted at one time using a multi-hole support plate device (2), wherein the multi-hole support plate device (2) comprises a support plate body (21) and a lifting lug (22) vertically arranged on the support plate body (21), and the support plate body (21) is provided with a rod-through hole (211) for the anchor bolt (33) to pass through.

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